Impbovement in clamps fob



@niiet .tatrs getter' @fitta E. E. VAN ETTEN, OF MOUNT MORRIS, NEW YORK. Leners Parent No. 66,764, dma-.My 16, 1867.

IMPROVEMENT IN GLAMPS FOR FILING SAWS.

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TO ALL WHOM IT MAY CONGERN:

Be it known that I, E. E. VAN ETTEN, of Mount Morris, in the county of Livingston, and'State of New York, have invented a certain new and useful Improvement in Clamps for Saws, applicable also to other purposes;

and I do hereby decla-re that the following is a full and exact description thereof', reference being had Vto the" accompanying drawings, making part of this specification.

Figure 1 is a perspective view of my improved device.

Figure 2, a Vertical section of the swivel standard and a portion of the seat.

Figure 3, a view of the key-hole arrangement for holding the end of the lower set-screw.

Like letters of reference indicate corresponding parts in 'all the figures.

My invention consists in combining, with a swivelled standard formed of two jaws, a pair of set-scrcws so arranged that the jaws may be adjusted parallel to suit different thicknesses of the saws, and so arranged that the movable jaw may be readily detached, and the stationary jaw having a groove for the reception of the base of the saw, the whole arranged as hereafter described. i

As represented iu the drawings, A is the seat for the operator, which is supported by legs a cr. 'With one end is connected a swivel standaid, B, by a bearing, e, resting in a corresponding socket in the seat, so as to form ajoint and allow the standard to be turned around in different positions. Extending` down from .the

standard B through the seat A is a screw, CZ, provided with a clamping-nut, e, which serves to hold the standard steadily in place when tightened, and allows it to be turned when desired. The standard is divided into two clamps O D, with jaws jj. The part is` stationary, while D is made to adjust in and out, by means of setscrews g t, situated at suitable distances apart. The screw g is made stationary with the clamp C, but passes loosely through D, and is provided at its outer end with a hand-nut, z', which is employed for clamping the article firmly between the jaws after the lower end of the movable clamphas been fixed in thepropcr position. The lower screw L passes through clamp D, and has on its inner end a head, Z, with neck o, which fits in a keyhole slot, r, of a metallic plate, lr, of the stationary part O. The head Z is inserted through the larger or circular portion of the slot, and the neck o is then slid down into the narrow passage of thc'slot, (as shown in fig.

2,) in which it turns easily, but cannot be withdrawn or forced in. On the inner face of the stationary clamp C is formed a vertical slot or groove g, which stands on a vertical plane with the clamp face 'of thestationary jaw, and is of sucicnt width to admit saws of the maximum thickness. This groove serves as a bearing for the lower edge of the saw-blade when iixed in the clamp. VThe lower end of the standard is raised on a rim, s, of a little less diameter, so that such filings as fall around the standard cannot enter the joint and produce wear, but 'will be thrown oil` below. Clamp standards for saws have before been used. Thenovelty in my' invention consists in combining with a swivelled clamp the special features for adjusting and holdingthe article as herein described. Sawblades are of varying thickness, and in ord er to make the clamping'jaivs hold firm the whole extent of their bearing surface, itis necessary to make the bottom as well as the top adjustable out and in. This is accomplished by the employment of the screws g li. The sorew 7L is first set out to the proper extent to correspond with the thickness of the saw. Then, when the saw-'is in place, the nut z' is turned up so asl to clamp it rmly. In this manner the bearing surfaces of jaws jj are made to hold equally their whole vertical extent upon the blade, and thus prevent any swaying or vibration bythe rasping action, as would occur if only one point of thejaws touched. The employment of the basegroove q for the saw enables lme to retain the saw always in a vertical position relatively with thej'aw surfacelof O, irrespective of the adjustment of D. Thus it is only necessary to adjust D in position to bring the DIampingjaws in line, and the saw'itsclf is in nowise ailected by the adjustment. If the saw simply rested in the space between the Shanks, itwould be difficult to adjust and bold it properly. The employment of the key-hole` socket r, in connection with the Screw'h, not only furnishes a convenient connection, but also enables meat-any time to disconnect the clamps by simply removing nut and screw g, and raising the part D up, It is obvious that the device thus described may be employed for other similar uses.

What I claim as my invention, and desire to secureby Letters Patent, isf- The arrangement of the swivelled clamps C D, the set-screws L'g, key-hole socket r, andthe groove q, constructed and operating in the manner and for the purposespecied. l j

In witness whereof I havehereunto signed my name in the presence of two subseribingwitnesses.

' l i E. E. VAN ETTEN.

Witnesses;

McNEIL SEYMOUR, M. J. BARcALo. 

